The Jerusalem Artichoke (Helianthus tuberosus), also called sunchoke or earth apple, is a towering sunflower relative that produces knobbly, potato-like tubers with a unique, sweet, nutty flavor and a notorious side effect. Its name is a triple misnomer — it is not from Jerusalem (it is native to North America), it is not an artichoke (it is a sunflower), and it is not a quiet digestive experience (its inulin-rich tubers are famous for causing gas). Despite this culinary baggage, Jerusalem artichokes are delicious, nutritious, and among the easiest perennial vegetables to grow.
• Not from Jerusalem, not an artichoke — the name may be a corruption of the Italian "girasole" (sunflower)
• Also known as "sunchoke," a modern marketing name coined in the 1960s
• Tubers are rich in inulin, a prebiotic fiber that feeds gut bacteria — with notable gassy consequences
• A perennial sunflower that can grow over 3 meters tall
• Once planted, nearly impossible to eradicate — every tiny tuber fragment regrows
• Known as "topinambur" in Europe, where it became a major famine crop
• Originated in the central and eastern United States, from the Great Plains to the Atlantic coast
• Cultivated by Native American tribes including the Huron, Iroquois, and Cherokee for centuries before European contact
• First sent to Europe from the French colony of New France (Canada) by Samuel de Champlain around 1603
• Reached France by 1607, where Champlain noted its artichoke-like flavor — giving rise to the "artichoke" name
• Became widely popular in Europe, especially France and Italy, as both a food and animal fodder
• Was a major crop in Europe before the potato became dominant
• The "Jerusalem" part of the name likely comes from a corruption of "girasole" (Italian for sunflower, meaning "turning to the sun")
• First described by Linnaeus in 1753
• Now grown commercially worldwide, especially in France
• Has naturalized widely in Europe and parts of Asia
Above-ground:
• Stout, hairy stems up to 3.5 meters tall, branching near the top
• Large, rough, broadly ovate leaves, 10 to 25 cm long, with toothed margins
• Lower leaves opposite; upper leaves alternate
• Bright yellow sunflower-like flower heads, 5 to 10 cm across
• Flowers appear in late summer to autumn
• Yellow ray florets surrounding a central yellow disc
Tubers:
• Knobbly, irregular, variable in shape, 5 to 15 cm long and 3 to 8 cm wide
• Thin skin ranging from pale brown to reddish-purple
• White, crisp, juicy flesh with a sweet, nutty, slightly earthy flavor
• Texture similar to water chestnut when raw; like potato when cooked
• Variable in size from small knuckles to fist-sized
• Grow on stolons radiating from the base of the stem
Roots:
• Extensive fibrous root system with tuber-bearing stolons
• Tubers can form 30 to 60 cm from the parent plant
• Extremely adaptable, growing from USDA zones 3 to 9
• Prefers temperatures between 15 and 28°C but tolerates much wider ranges
• Requires full sun for best tuber production
• Adapts to virtually any soil type but prefers fertile, well-drained loams
• pH range from 5.0 to 7.5
• Very drought-tolerant once established
• Tolerates poor soils better than most root crops
• Produces tubers from mid-summer onward, harvested after first frost
• Plants die back after frost; tubers survive underground
• Can become invasive — every tuber fragment left in the ground regrows
• Resistant to most pests and diseases
• Attracts beneficial insects and pollinators when flowering
• Very high in inulin (a prebiotic fiber), comprising 16 to 20% of fresh weight
• Inulin feeds beneficial gut bacteria, promoting digestive health — but causes gas in unaccustomed consumers
• Good source of thiamine (vitamin B1), potassium, and iron
• Contains moderate amounts of phosphorus, niacin, and copper
• Low glycemic index — inulin does not spike blood sugar, making it suitable for diabetics
• Lower in calories than potatoes, approximately 70 to 80 kcal per 100 g
• Contains vitamin C and small amounts of riboflavin
• No starch — carbohydrates are stored as inulin, not starch
• Gluten-free and suitable for low-carb diets
• High in dietary fiber
• Plant tubers 10 to 15 cm deep in early spring, 30 to 45 cm apart
• Rows should be 60 to 90 cm apart
• Plant in a permanent location — they will regrow every year from missed tubers
• Provide support for tall stems in windy locations
• Keep soil moderately moist during the growing season
• Hill up soil around the base to encourage tuber formation
• Cut back flower stalks to direct energy to tuber production (optional)
• Harvest after the first frost when foliage has died back
• Dig carefully to find all tubers — any left behind will regrow
• Can be harvested through winter in mild climates by digging as needed
• Store tubers in the ground or in cool, moist conditions (they do not store well out of ground)
Raw:
• Sliced or grated into salads for a crisp, water chestnut-like crunch
• Used in slaws and raw vegetable platters
• Thinly sliced and dressed with vinaigrette
Cooked:
• Roasted with olive oil, herbs, and garlic
• Boiled and mashed like potatoes (though not as fluffy)
• Pureed into creamy soups
• Sautéed in butter until caramelized
• Used in gratins and baked dishes
• Made into "sunchoke chips" by thin-slicing and frying
• Pickled in vinegar
Special preparations:
• French "topinambour purée" is a classic preparation
• Can be used in place of potatoes in most recipes
• Jerusalem artichoke flour can be used in baking
Wusstest du schon?
The Jerusalem Artichoke is neither from Jerusalem nor an artichoke, and its most notorious characteristic is making people fart — yet it remains one of the most delicious root vegetables you can grow. The French are so devoted to it that they consume over 60,000 tons annually, and the great French chef Joël Robuchon once declared the sunchoke "the most unjustly neglected vegetable in the French kitchen." The gas, apparently, is a small price to pay for perfection.
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